Purpose and Scope of this Review

The objectives of this review are:

  • Review and approve the design of the SCT End-cap support structures, discs and thermal enclosures including the support wings. A PRR will be held at a later date to review manufacturing drawings and specifications and to release CORE funds for production.

Review and approve all on-cylinder components including all service routings from the on-disc patch panels, PPF0 to the exit from the thermal enclosure.

  • Review the design of all on-disc components including disc inserts, disc fixings, cooling pipes, cooling blocks, low mass tape layout, optical fibre layout, patch panels (PPF0). To freeze the interface between these items and the support structures. It is anticipated that some of these components may need another FDR depending on the outcome of the K4 problems – see below.
  • Review and approve the overall process for macro-assembly.

This review should confirm the soundness of the design choices made, and should survey all performance specifications and interfaces with other components in the End-cap region of the SCT structures. To also confirm for the End-cap SCT Support Structures and Discs, that the SCT End-cap Mechanics team can close the layout design phase, complete the detailed technical specification, enter the procurement phase and thereafter organize the Production Readiness Review.

Note that there is currently a great deal of uncertainty about the electrical performance of the baseline forward module. If the review is successful then the proposed plan of action is as follows:

  • Proceed with preparation of the manufacturing specifications for the support structures and discs. Follow on to PRR and tender as soon as possible. If a major redesign of modules and disc services is needed then try to do this within the baseline interface to the support structures and discs. Only hold up order and change design if there is no other viable solution.
  • Delay proceeding to detail design and manufacturing specifications for all on-disc services until the outcome of the module development and testing is known.

A critical assessment will be made of all performance, engineering, and interfacing aspects of the project, as well as confirmation of the necessary level of global and local production organisation and supervision. In general terms, the review should address the following points:

•Are all functional requirements completely and consistently defined and are they satisfactorily met by the proposed design.

•Has the required performance been satisfactorily demonstrated on prototypes.

•Are design risks adequately considered.

  • Are the proposed solutions supported by calculations in terms of performance and safety.
  • Are material and technological choices adequate, tolerances and clearances reasonable and acceptable.*
  • Are QA plans for procurement, production and assembly outlined.*
  • Are assembly and qualification test procedures defined and understood.*
  • Are all integration and operational issues (neighboring elements) satisfactorily covered.
  • Are long-term operation and maintenance aspects taken into account.*
  • Are procurement plans and schedules feasible, are manpower and space requirements clear.*

* ) as far as available

Agenda

Thursday 1 November 2001 at CERN in 40-R-B10

09h00Introduction (B. Szeless)

09h05Project Overview (D. Greenfield)

09h30Requirements for the End-cap Mechanics (N. Hessey)

10h0009h45Overview of the Baseline End-cap Mechanics (D. Greenfield)

10h10Interfaces (D. Greenfiel)

10h30Disc services – cooling (S. Temple)

11h00Coffee

11h30Disc services – LM power tapes, optical fibres (S. Temple)

12h00Disc design and prototyping (P. Werneke)

13h00Lunch

14h00Support cylinder and wings – design and prototyping (J.Tarrant/C.Nelson)

15h00Cylinder services and patch panels (J. Tarrant)

15h15Interfaces (D. Greenfield)

15h3015h20Tea

16h0015h40Thermal enclosures – cylinders (J. Tarrant)

16h10Grounding and Shielding (T. Jones)

16h25Material Budget (T. Jones)

16h3016h40Assembly (D. Greenfield)

17h00Summary of requests to reviewers

Friday 2 November 2001 in 40-R-C10

09h00Reviewers initial feedback

09h45SCT team response

10h15Presentation of Review Conclusions

11h00Close Review

People present

Review Committee:
B. Szeless, CERN, Chair
R. Hawkings, CERN
M. Olcese, INFN
R. Apsimon, RAL
J. Greenhalgh, RAL
E. Berbee, NIKHEF
E. Perrin, Geneva
Ex officio:
M. Nessi, CERN
S. Stapnes, Oslo
G. Tappern, CERN
M. Tyndel, RAL
TC team:
O. Beltramello, CERN
GP. Benincasa, CERN
M. Hatch, CERN / SCT Team:
H. Band, NIKHEF
R. Bates, Glasgow
T. Brodbeck, Lancaster
C. Buttar, Sheffield
I. Duerdoth, Manchester
P. Ford, RAL
D. Greenfield, RAL
F. Hartjes, NIKHEF
S. Haywood, RAL
N. Hessey, NIKHEF
E.P. Hover, NIKHEF
J. N. Jackson, Liverpool
T. Jones, Liverpool
C. Nelson, RAL
V. O’Shea, Glasgow
A. Smith, Liverpool
Q.H.C. Snippe, NIKHEF / S. Snow, Manchester
P. Sutcliffe, Liverpool
J. Tarrant, RAL
S. Temple, RAL
G. Taylor, Melbourne
P. Werneke, NIKHEF
For Information:
J. Carter, Cambridge
A. Clark, Geneva
L. Feld, Freiburg
  1. Grillo, Santa Cruz
M. Mikuz, Lublijana
H. Pernegger, CERN
T. Weidberg, Oxford

SCT End Cap Mechanics FDR

  • Welcome

Thanks for having come

Thanks for having prepared all the documents

  • People present
  • Rules of the game

Agenda is dense but shall be modified to our needs

Open discussion where everybody asks questions, leave enough time for discussion

Request to reviewers and reviewees: wish to get comments and recommendations of two types:

Constructive comments and recommendations which help project progress

Warning if serious doubts on some aspects, accompanied with realistic recommendation